package servlet;

import pojo.Dept;
import service.DeptService;
import service.Impl.DeptServiceImpl;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;

@WebServlet(urlPatterns = {"/dept"})
public class DeptServlet extends HttpServlet {
    DeptService deptService = new DeptServiceImpl();
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doPost(req, resp);
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        DeptService deptService = new DeptServiceImpl();
        req.setCharacterEncoding("UTF-8");
        String action = req.getParameter("action");
        if("list".equals(action)){
            //接收参数
            String dname = req.getParameter("dname");
            Dept condition=new Dept(dname);
            //创建业务类对象  多态
            List<Dept> depts = deptService.findAll(condition);
            req.setAttribute("depts",depts);
            req.setAttribute("condition",condition);
            //转发
            req.getRequestDispatcher("/list.jsp").forward(req,resp);
        }else if ("add".equals(action)) {
            //拿到页面传递的参数
            String name = req.getParameter("dname");
            int result = deptService.addDept(new Dept(name));
            if (result > 0) {
                //重定向 再查询
                resp.sendRedirect("dept?action=list");
            }
        } else if ("delete".equals(action)) {
            //拿到页面传递的参数
            String sid = req.getParameter("id");
            Integer id = Integer.parseInt(sid);
            //根据id查询用户信息
            int result = deptService.deleteDeptById(id);
            if(result > 0){
                //重定向到查询所有用户页面
                resp.sendRedirect("dept?action=list");
            }
        } else if ("toupdate".equals(action)) {
            //拿到页面传递的参数
            String sid = req.getParameter("id");
            Integer id = Integer.parseInt(sid);
            //根据id查询用户信息
            Dept dept = deptService.findById(id);
            //将查询到的用户信息存储在作用域中
            req.setAttribute("dept",dept);
            req.getRequestDispatcher("update.jsp").forward(req,resp);
        } else if ("update".equals(action)) {
            //获取页面隐藏的id
            String sid = req.getParameter("id");
            Integer id = Integer.parseInt(sid);
            //拿到页面传递的参数
            String name = req.getParameter("dname");
            int result = deptService.updateDept(new Dept(id,name));
            if(result>0) {
                //重定向 再查询
                resp.sendRedirect("dept?action=list");
            }
        }
    }
}
